Practice Forum| Volume 25, ISSUE 3, P335-341, July 2012

Thermoplastic Hinges: Eliminating the Need for Rivets in Mobilization Orthoses

      Simplifying orthotic fabrication in the clinic is of value to both therapists and patients. This author describes a technique of using thermoplastic material to create a hinge, thus eliminating the task of lining up hinges with the joint axis of motion. Three different orthotic designs using this technique are described in this article.—Victoria Priganc, PhD, OTR, CHT, CLT, Practice Forum Editor
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        • Dymarczyk M.
        A new device for flexor tendon injuries: a locking mechanism for the tenodesis orthosis for flexor tendon repairs.
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      JHT Read for Credit

      Quiz: Article #235

      Record your answers on the Return Answer Form found on the tear-out coupon at the back of this issue or to complete online and use a credit card, go to There is only one best answer for each question.
      • #1.
        The concept of the flexible hinge is applicable to
        • a.
          only the 3 designs presented in the paper
        • b.
          a variety of joints and diagnoses
        • c.
          all joints and diagnoses
        • d.
          only Aquaplast
      • #2.
        The hinge is fabricated as a
        • a.
          flat piece of thermoplast combining 3 layers in a laminated manner
        • b.
          3 inch piece of coat hanger encased in a thermoplastic tube
        • c.
          flexible tanned leather strap
        • d.
          hand-rolled thermoplastic tube
      • #3.
        The wrist orthosis has a
        • a.
          CPM component which regulates the ROM
        • b.
          volar block
        • c.
          dorsal block
        • d.
          volar and dorsal block
      • #4.
        The elbow SPS orthosis has
        • a.
          a CPM component to regulate the ROM
        • b.
          a turnbuckle to deliver an over-pressure torque
        • c.
          an elastic component to deliver an over-pressure torque
        • d.
          no element to deliver an over-pressure torque
      • #5.
        The author addresses the issue of material fatigue of the thermoplastic hinge over time
        • a.
        • b.
      When submitting to the HTCC for re-certification, please batch your JHT RFC certificates in groups of 3 or more to get full credit.